the pendulum is moving back in colorado. this is a year in which republicans believe that they were going to be able to capture the senate seat now held by michael bennett and the governor's office. but along the way they've all gotten tangled up in these internal party fights. as you suggest a lot of it is is who is outsider, who is the insider, who is more conservative in the republican party, who is more liberal in the democratic party? what's the power of the party bases? we've now got these three primary races that are all too close to call. >> ifill: let's try to go through them one by one. how did michael bennett get to be so vulnerable? the incumbent senator. >> a couple of reasons. one is appointed senators or people who get appointed often have trouble because they have no roots. michael bennett has never been in politics. he had come out of the school system. he was superintendent of schools in denver. he had no political network, no political fund raising network or political base. he was plucked from relative ob